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The following code produces a rasterized font:

\documentclass{beamer}

\usepackage[OT2,OT1]{fontenc}

\newcommand{\cyr}{%
\renewcommand\encodingdefault{OT2}%
\normalfont\selectfont}
\newcommand{\lat}{%
\renewcommand\rmdefault{cmr}%
\renewcommand\encodingdefault{OT1}%
\normalfont\selectfont ...

Take a look at the following code:

$$\begin{array}{rr|r|c|l}
vd_2:&\raisebox{0pt}[0pt]{\makebox[0pt][l]{$\overbrace{\phantom{b_1\dots b_{n-l_{k-1}-2k}\hspace{2\arraycolsep}b_{n-l_{k-1}-2k+1}\dots b_{n-k-1}b_{n-k}\hspace{2\arraycolsep}c^k}}^v$}}b_1\dots b_{n-l_{k-1}-2k}&b_{n-l_{k-1}-2k+1}\dots b_{n ...

Seems that there is no way to do what I described. Thank you all anyway, especially Juanjo, whose solution is very nice and I believe that it can be adapted for most of the similar problems.

I would like command similar to \phantom, but which moves not forward, but backward. See the following example:

$k+1,k+2,k+3,\dots,\overline{2k,\phantom{1}}\hspace{-2.8mm}\underbrace{1,2,3,\dots,k,}2k+1$

I would like to do this in a more elegant way than to use \hspace with negative value.

Of ...

Thank you both once more. Stefan's solution works just fine.

Stefan, thank you for your advice, but I know for arydshln and it doesn not fit my needs. I don't need dashed lines in array, only a symbol.

Localghost, you got correctly what I need. Thank you very much for \textbrokenbar command. It almost perfectly fits my needs. The only thing I would have ...

Hello. I want to write a vertical dashed line—it should look like \vdots, but with small vertical dashes instead of dots. Is there any package containing a symbol like that?